I need someone to do these problems for me. I don't understand them and I need them turned in asap. Algebra/Trig

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. 4x^2 + 20x + 25 = 0

80 points suppose marcy made 45 posts online. if 23 of them contained an image, what percent of her posts had images? round your answer to the nearest whole percent. 54 percent 51 percent 49 percent 48 percent